Provided are multiple switched reluctance motors and excitation control methods for same. Motors with various structures are provided having the same structural characteristics, a stator formed of an even number of salient pole pairs and a rotor formed of an even number of salient pole pairs. The salient poles of the stator salient pole pairs are arranged opposite the salient poles of the rotor salient pole pairs, with minimal air gaps left between said salient pole pairs, thus leaving the shortest magnetic return paths between the stator salient pole pairs and the rotor salient pole pairs arranged opposite one another, thus satisfying the minimum reluctance principle of the switched reluctance motor. In addition, due to the magnetic isolation between each stator salient pole pair, the performance of the magnetic pole of each stator salient pole pair is controlled by an excitation control power source and changed independently.

An electric actuator comprises a housing, an electric motor comprising a wound stator and a rotor mounted on a shaft, a printed circuit for powering the stator, an intermediate plate, a mechanical reduction gear driven by the rotor and comprising toothed wheels mounted on axes, a cover and two centering pins. The motor is housed in a cavity of the housing, which guides one end of the shaft. The printed circuit is located above the stator. The intermediate plate is located above the circuit. The cover is located above the intermediate plate. The reduction gear is housed in a cavity of the cover, which guides one end of each axis. The intermediate plate guides the other end of the shaft and of the axes. Three pairs of centering holes receive the centering pins. The housing comprises a single sealing gasket positioned at the interface between the housing and the cover.